Pretty much, I was playing creative, and my WE wasn't working. So I went and destroyed some blocks on the road to test for lag. Sure enough, they stayed broken, meaning lag, however normally they reappear when the lag stops or I exit and reenter the server. The server crashed, and when I came back, I found this:
I have confirmed that other players can see this. Go to plot 345;344 and look behind you to find it. Will and admin please fix this? :3